Dennis lane



(No Model.)

' D. LANE.

SAW MILL DOG. No. 316,273.- I Patented Apr. 21, 1885 NITED TATES PATENTFFICE DENNIS LANE, OF MONTPELIER, VERMONT, ASSIGNOR TO THE LANE MANU-FAO'IURING COMPANY, OF SAME PLACE.

SAW M'I LL DOG.

SPECIFICATION forming part of Letters PatentNo. 316,273, dated April 21,1885.

Application filed February 27. 1885. No model.)

To all whom it may concern: I

Be it known that I, DENNIs LANE, a citizen of the United States,residing at Montpelier,

in the county of Washington and State of Vermont, have invented certainnew and useful Improvements in Saw-Mill Dogs; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters and figures of reference marked thereon, which form apart of this specification.

This invention relates to an improved dogging device for sawmillset-works; and it 0011- sists in the construction and combination ofparts, as hereinafter more fully set forth.

In the annexed drawings, illustrating the invention, Figure l is-a sideelevation of my improved saw-mill dog. Fig. 2is a front view of thesame. Fig. 3 represents a side and front view of one of thevertically-moving slides, with attached dogs; and Fig. 4 is a detailview.

Like letters of reference designate like parts in the several views.

The slotted knee or upright A is placed in suitable guides on theset-beam B or other convenient support.

0 is a rock-shaft that is journaled in the guide-frame D, and carries atone end a socket, E, for a lever, F, having a spring-pawl, G, forengaging a ratchet, H. On the other end'of the rock-shaft G is cast anarm, I, for attachment of a rod or bar, K, that connects with.

the upright or knee A. By moving the lever F the upright A, withattached dogs, can be adjusted forward or back to correspond with thecrook or taper of the log.

To the upper end of the knee A is pivoted an oscillatory plate, L, towhich are attached the connecting-rods M M, that actuate thedogging-slides N N in opposite directions. These dogging-slides aresupported in the slotted knee A by means of diagonal guides, as usual,so as to have a slight forward and back movement when reciprocatedvertically.

the slides N carries upwardly-proj ecting teeth, and the other isprovided with teeth that point downward, said upper and under teethbeing One of I 1 set at an angle and arranged to bite hard when movedtoward the log.

A curved lever, P, is pivoted to the upper part of the knee Acoincidently with the rack- 5 5 ing plate L, which it actuates by comingforcibly in contact with a shoulder, Q, at either end of said plate onits rear side. Additional force is given to the blow of the lever P bymeans of a weighty knob or ball, R, on its upper end.

By reference to Fig. 4 it will be seen that there is sufficient spacebetween the shoulders Q Q for play of the lever P without actuating theplate L or rods Mil/I, so that in dogging the lever is enabled to gainsome impetus before striking the shoulder Q or starting the teeth. Itwill also be seen that if the teeth are not sufficiently projected intothe log by one blow of the lever it may be moved back without looseningor withdrawing the teeth and repeated blows given until the log issecure. I

When either end of the shouldered plate L is forced down in dogging orundogging, the

opposite end is carried up, thus moving the rods M M and dogging-slidesN N in opposite directions.

The knob or ball R not only adds force to the blow of the lever P, butalso by weight holds it in position when thrown to either end of therocking plate.

This dog can be readily operated either from the back or front byadjusting the teeth to the log with one hand on the lever F, while withthe other hand the weighted lever P can be made to give one or moreblows of sufficient force to drive the teeth in and hold them. Byreversing the action of the lever P and causing it to strike against theshoulder at the op- 0 7' site directions, a weighted lever and an oscil-10o latory plate pivoted coincidently to the upper part of the upright,said plate having a shoulder at'each end to receive the blows of said Ible dogging-slides, N N, supported therein, of r 5 weighted lever, androds for connecting one of the dogging-slides to each end of saidoscillatory plate, substantially as described.

2. In a saw-mill dog, the combination, with the upright A, carryingoppositely-moving dogging-slides N N, ofthe rock-shaft G, having arm Iand socket E, the rod or bar K, for connecting said arm and upright, thepawl-lever F, inserted in said socket, and the ratchet H, for lockingthe pawl, substantially as described.

3. In a saw-mill dog, the combination,with the upright A and a pair ofoppositely-movathe weighted lever P and oscillatory plate L, pivotedcoincidently at the upper part of the upright, said plate havingshoulders Q Q, to receive the blows of said lever, and the rods M M, forconnecting one of the dogging-slides to each end of said plate,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

DENNIS LANE.

Witnesses:

LILLIAN D. SLACK, GEO. W. WING.

